# Read-only benchmark

This tests the latency, sequential read, and random read speeds of a variety of data.

## Installation

To install this, run the following:

```sh
git clone https://git.askiiart.net/askiiart/disk-read-benchmark
cd ./disk-read-benchmark/
cargo update
cargo install --path .
```

Make sure to generate and add the completions for your shell:

- bash: `disk-read-benchmark generate-bash-completions | source`
- zsh: `disk-read-benchmark generate-zsh-completions | source`
- fish: `disk-read-benchmark generate-fish-completions | source`

(note that this only lasts until the shell is closed)

## Running

The program will automatically generate all data used, except for the regular polygon data. Once the data is generated, stop the program with Ctrl+C, then run `prepare.sh` to archive and mount the data using [DwarFS](https://github.com/mhx/dwarfs), `tar`, and [`fuse-archive`](https://github.com/google/fuse-archive).

It will output its data at `./data/benchmark-data.csv` and `./data/bulk.csv` in these formats:

`benchmark-data.csv`:

```txt
filesystem dir,file path,sequential read time,sequential read latency,random read time,random read latency
```

`bulk.csv`:

```txt
filesystem dir,folder path,test type,time1,time2,time3,[...]
```

### Arguments

```txt
Usage: disk-read-benchmark <COMMAND>

Commands:
  generate-bash-completions  Generate bash completions
  generate-zsh-completions   Generate zsh completions
  generate-fish-completions  Generate fish completions
  grab-data                  Grabs the datasets used for benchmarking
  benchmark                  Runs the benchmark
  prep-dirs                  Prepares the directories so other programs can prepare their datasets
  run                        Runs it all
  help                       Print this message or the help of the given subcommand(s)

Options:
  -h, --help     Print help
  -V, --version  Print version
```

### Data used

- 25 GiB random file
- 25 GiB empty file
- 1024 1 KiB random files
- 1024 1 KiB empty files
- Linux kernel source (compressed and non-compressed)
- 100 million-sided regular polygon, generated by the `headless-deterministic` branch of [confused_ace_noises/maths-demos](https://git.askiiart.net/confused_ace_noises/maths-demos)

## Usage

You can put the data in folders in `./data/mountpoints/`, which can be on different filesystems (including stuff like [DwarFS](https://github.com/mhx/dwarfs) archives mounted with FUSE). Running `grab-data` and `prep-dirs` will create all the necessary files it can, at which point you just add the polygon data, put the stuff to be benchmarked in the `mountpoints` dir, then run it with the `benchmark` argument.